Assume the beam is focused by a lens to a circular spot

Assignment Help Physics

Reference no: EM13542133

A HeNe (Helium-Neon) laser has a beam power of 5.00 mW at a wavelength of 656 nm. Assume the beam is focused by a lens to a circular spot whose effective diameter is 15 wavelengths of the light.

a) What is the intensity of the focused beam?
b) What is the radiation pressure exerted by the focused beam on a perfectly absorbing surface?
c) How much momentum is carried by a 1 meter length of the focused beam?

Reference no: EM13542133

Questions Cloud

Find the average recoil force experienced by the machine gun : A machine gun fires 25-g bullets at the rate of 4 bullets per second. What is the average recoil force experienced by the machine gun

Advantage of freight consolidation : The deliveries can be made using Less-than-Truck-load trucks, air express, private truck fleet, and UPS. What factors should be considered in selecting among these alternatives?

Explain when the ph of a solution is 2 units lower then pka : When the pH of a solution is 2 units lower than the pKa of the buffer in the solution, the conjugate base/weak acid (A-/HA) is Enter a number only (no scientific notation please).

Calculate what is the mass of the projectile : A projectile is launched with a momentum of 200 kg • m/s and 1000 J of kinetic energy. What is the mass of the projectile

Assume the beam is focused by a lens to a circular spot : A HeNe (Helium-Neon) laser has a beam power of 5.00 mW at a wavelength of 656 nm. Assume the beam is focused by a lens to a circular spot whose effective diameter is 15 wavelengths of the light.

Determine how far from the objective is the hair : A forensic scientist is using a standard biological microscope with a 15 X objective and a 5 X eyepiece to examine a hair from a crime scene. How far from the objective is the hair

Explain what is the equilibrium constant for the reaction : The hydrolysis of glucose-1-phosphate to glucose and Pi has a standard free energy of -5 Kcal/mol. What's the equilibrium constant for the reaction

Determine the ph after adding the volumes of koh : Consider the titration of 25.0 mL of 0.0500 M HClO4 (perchloric acid, a strong acid) with 0.100 M KOH (a strong base). (a) Find the volume require o reach the equivalence point (complete the reaction). Find the pH after adding the following volume..

Complete circle around peg after the string catches on peg : A ball is attached to a horizontal cord of length L whose other end is fixed. A peg is located at a distance d directly below the fixed end of the cord. The ball is released from rest when the string is horizontal. ?

User Account

All Pages